搜索
On May 22, 2021, China lost two great stars of science, Yuan Longping and Wu Mengchao. The news made Chinese people very sad.
Yum Longping was famous as the “Father of hybrid Rice (杂交水稻)”. He studied rice in his whole life. In the 1970s, he developed a hybrid strain of rice. It could feed 70 million more people a year. Today about 20% of the world’s rice comes from the hybrid rice. Yuan said he had a dream. In his dream, his hybrid rice plant was taller than men. He sat under it to enjoy the cool of its shade (背阴处).
Wu Mengchao was the founder of hepatobiliary surgery (肝胆外科) in China. For a time, the success rate (成功率) of hepatic surgery (肝脏手术) was only 16%, Wu raised it to over 98%! He saved many people’s lives. Even into his nineties, he was still working at the operating table.
These two top scientists have left us. But we can find them in the sky. They each have a planet which has been named after them. They are the brightest stars in our heart.
1．What happened on May 22, 2021?| A．Two stars are lost in the sky. |
| B．Both Yuan Longping and Wu Mengchao died. |
| C．Yuan Longping developed the hybrid rice. |
| D．Wu Mengchao was still working at the operating table. |
A． | B． | C． | D． |
| A．He was famous as the “Father of hybrid Rice”. |
| B．He let more people have enough food to eat. |
| C．He raised the success rate of hepatic surgery. |
| D．He stopped working at the age of ninety. |
| A．People’s food and education. |
| B．People’s food and health. |
| C．People’s health and environment. |
| D．People’s environment and education. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
